diff --git a/README.md b/README.md
index f930c35..243df56 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,151 @@
 # abcd add haha ... git-auto-commit Action
-# add env
+# add env #!/usr/bin/env bash
+
+
+set -o pipefail
+
+readonly DEFAULT_FILE_MAXSIZE_MB="30" 
+readonly CONFIG_NAME="hooks.maxfilesize"
+readonly NULLSHA="0000000000000000000000000000000000000000"
+readonly EXIT_SUCCESS=0
+readonly EXIT_FAILURE=1
+readonly DEFAULT_REPO_MAXSIZE_MB="1024" 
+readonly CHECK_FLAG_ON=1
+
+env
+
+echo "CHECK_FLAG_ON=====$CHECK_FLAG_ON"
+echo "PUSH_SIZE_CHECK_FLAG=====$PUSH_SIZE_CHECK_FLAG"
+
+status="$EXIT_SUCCESS"
+
+# skip this hook entirely if shell check is not open
+check_flag=1 #${PUSH_SIZE_CHECK_FLAG}
+if [[ $check_flag != $CHECK_FLAG_ON ]]; then
+exit $EXIT_SUCCESS
+fi
+
+export REPO_MAX_SIZE=50
+
+echo "REPO_MAX_FILE_SIZE===${REPO_MAX_FILE_SIZE}"
+echo "REPO_MAX_SIZE===${REPO_MAX_SIZE}"
+echo "REPO_CURRENT_SIZE===${REPO_CURRENT_SIZE}"
+
+
+
+
+#######################################
+# check the file max size limit
+#######################################
+
+# get maximum filesize (from repository-specific config)
+maxsize_mb="${REPO_MAX_FILE_SIZE}"
+
+if [[ "$?" != $EXIT_SUCCESS ]]; then
+echo "failed to get ${CONFIG_NAME} from config"
+exit "$EXIT_FAILURE"
+fi
+
+push_size="0"
+# read lines from stdin (format: "<oldref> <newref> <refname>\n")
+while read oldref newref refname; do
+# skip branch deletions
+if [[ "$newref" == "$NULLSHA" ]]; then
+  continue
+fi
+
+# find large objects
+# check all objects from $oldref (possible $NULLSHA) to $newref, but
+# skip all objects that have already been accepted (i.e. are referenced by
+# another branch or tag).
+
+new_branch_flag=0
+if [[ "$oldref" == "$NULLSHA" ]]; then
+  target="$newref"
+  new_branch_flag=1
+  echo "You are creating a new remote branch,openI will check all files in commit history to find oversize files"
+else
+  target="${oldref}..${newref}"
+fi
+echo "target==${target}"
+
+maxsize=`expr $maxsize_mb \* 1048576` 
+
+# find objects in this push_size
+# print like:
+# 08da8e2ab9ae4095bf94dd71ac913132b880b463 commit 214
+# 43e993b768ede5740e8c65de2ed6edec25053ea1 tree 185
+# 4476971d76569039df7569af1b8d03c288f6b193 blob 20167318 b0417e6593a1.zip
+files="$(git rev-list --objects "$target" | \
+  git cat-file $'--batch-check=%(objectname) %(objecttype) %(objectsize) %(rest)' | \
+      awk -F ' ' -v maxbytes="$maxsize" 'BEGIN {totalIn=0} {if( $3 > maxbytes && $2 == "blob") { totalIn+=$3; print $4} else { totalIn+=$3}} END { printf ("totalIn=\t%s",totalIn)}' )"
+  
+if [[ "$?" != $EXIT_SUCCESS ]]; then
+  echo "failed to check for large files in ref ${refname}"
+  continue
+fi
+
+IFS=$'\n'
+# rewrite IFS to seperate line in $files
+for file in $files; do
+  # if don't unset IFS,temp_array=(${file}) will get error answer
+ 
+  if [[ ${file} == totalIn=* ]]; then
+	IFS=$'\t'
+	temp_array=(${file})
+	push_size=${temp_array[1]}
+	continue
+  fi
+	unset IFS
+  if [[ "$status" == $EXIT_SUCCESS ]]; then
+		echo -e "Error: Your push was rejected because it contains files larger than $(numfmt --to=iec "$maxsize_mb") Mb"
+		echo "help document -- https://openi.pcl.ac.cn/zeizei/OpenI_Learning/src/branch/master/docs/git/repository_capacity_help.md"
+		echo "oversize files:"
+		# status="$EXIT_FAILURE"	
+  fi
+  echo -e "\033[31m- ${file}\033[0m "
+done
+
+echo "push_size=======${push_size}"
+
+if [[ "$status" != $EXIT_SUCCESS ]]; then
+	exit "$status"
+fi
+
+done
+
+#######################################
+# check the repo max size limit
+#######################################
+if [[ $push_size -eq "0" ]]; then
+	exit $EXIT_SUCCESS
+fi
+
+# if create new branch or tag,use count-objects -v to get pack size
+if [[ $new_branch_flag -eq 1 ]]; then
+    size_kb=`git count-objects -v | grep 'size-pack' | sed  's/.*\(size-pack:\).//'`
+    size_pack_kb=`git count-objects -v | grep 'size:' | sed  's/.*\(size:\).//'`
+	total_kb=`expr $size_kb + $size_pack_kb`
+	let push_size=$total_kb*1024
+fi
+
+sizelimit_mb="${REPO_MAX_SIZE}"
+let sizelimit_b=$sizelimit_mb*1024*1024
+
+# repo size at here means the size of repo directory in server 
+reposize_b=${REPO_CURRENT_SIZE}
+
+total=`expr $push_size + $reposize_b`
+
+if [ $total -gt $sizelimit_b ]; then
+    echo "Error: Your push was rejected because the repository size is large than $sizelimit_mb Mb"
+    echo "see the help document--https://openi.pcl.ac.cn/zeizei/OpenI_Learning/src/branch/master/docs/git/repository_capacity_help.md"
+    exit $EXIT_FAILURE
+fi
+
+
+exit $EXIT_SUCCESS
+v
 
 > The GitHub Action for committing files for the 80% use case.